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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Accrued Liabilities, Current [Abstract]    
Accrued salaries, wages and benefits $ 7,907 $ 15,071
Accrual for insurance claims liabilities 68,822 60,365
Sales taxes 4,254 5,909
Property taxes 466 908
Sale-leaseback arrangement 709 676
Accounting and audit fees 50 344
Interest 22 22
Equipment purchase   461
Other accrued expenses 1,408 881
Total accrued liabilities $ 83,638 $ 84,637